Flurry tracks the activity of 45,000 developers who have built 90,000 different applications. Every time a developer starts a new project, Flurry knows which platform the developer is working on.

As you can see below, a smaller share of developers started Android projects in the second quarter of the year than the first. Flurry speculates the change was driven by the VerizoniPhone and the popularity of the iPad 2.